diff --git a/std/transport.c b/std/transport.c
index ec4870a..2a559ba 100644
--- a/std/transport.c
+++ b/std/transport.c
@@ -58,6 +58,7 @@
 
 private void unsubscribe_init();
 private int subscribe_init();
+void changeHp();
 
 /*
  ********** Management der builtin-properties **********